Folding cardboard box



Sept. 19, 1950 H. s. BLANDFORD 2,522,597

FOLDING CARDBOARD BOX I Filed Oct. 1, 1947 2 Sheets-Sheet 1 .EJJldhdfbfld INVENTOR j fi. BY W.

ATTORNEYS.

' P 1950 H. s. BLANDFORD 2,522,597

FOLDING CARDBOARD BOX 2 Sheets-Sheet 2 Filed 001.. l, 1947idifilaizdfazm? I mvmrcn Patented Sept. 19, 1950 l.

Y UNITED STATES mm oFFlcE Herbert S. Blandford, Elmira, N. Y., assignorto Medina Business Estate, Elmira, N. Y.

Application October 1, 1947, Serial No. 777,163

1 Claim. 1

This invention relates to box construction, and more particularly toboxes of cardboard or other suitable material, which are folded fromblanks cut in a particular manner.

The primary object of the invention is to provide a cardboard box blankwhich is so constructed that when portions thereof are folded inwardly,the inwardly folded portions constitute the sides and end of a box, tabsbeing provided on the ends of the side and end sections, the tabs beingso constructed and arranged that when the end sections are foldedinwardly, the tabs of the side sections will overlie the end sections insuch a way to securely hold the box in its formed position.

Still another object of the invention is to provide a blank which whenfolded in accordance with the invention, will provide a box with doubleend walls, the tabs of the end Walls extending appreciable distancesover the ends of the side walls to brace the side walls.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention consists of certain novel details ofconstruction and combinations of parts, hereinafter more fully describedand pointed out in the claim, it being understood that changes may bemade in the construction and arrangement of parts without departing fromthe spirit of the invention as claimed.

Referring to the drawings Figure l is a perspective View of a boxconstructed in accordance with the invention and folded into shape.

Figure 2 is a fragmental perspective View illustrating one end of thebox prior to the folding of the tabs of the side and end sectionsinwardly over each other.

Figure 3 is a fragmental elevational View illustrating one corner of thebox, the view being taken exteriorly of the bottom.

Figure 4 is a vertical sectional view taken longitudinally through a boxfolded from a blank constructed in accordance with the invention.

Figure 5 is a diagrammatic view illustrating the blank from which thebox is folded.

Referring to the drawings in detail, the blank comprises a length ofcardboard material, cut to provide a central section 5, the ends of thecentral section being out along inwardl extended lines 6, which areshaped to provide tabs '1? formed at the extremities of the end sections8 of the box blank. The end sections when folded along the lines 9 willprovide the ends of the box, and when folded along the lines I!) and II,will provide the corners of the box, the folded portion along the line Hcausing the tabs 7 to be directed inwardly over the ends of the sidesl2.

The sides It when folded inwardly along the lines It, will provide thesides of the box, and when the end portions of the sides !2 are foldedinwardly along the lines M and I5 provides the corners of the box thatfit around the end Sections to brace the end sections and provide doublewalled end sections. When making the out along line 6, tabs it areformed at the ends of the side members- 52, the tabs having pointedportions l'i adapted to it into slits It formed in the end sections 8.Formed in the side sections l2, are slits 59 which are so disposed thatthe tabs 7! will extend. thereinto, when the end sections are foldedinwardly. The pointed portions ll of the tabs [6 are split as at 20 tothe end that when the tabs l6 are moved so that the pointed portions Ilthereof extend through the slits 18, the split portions of the tabs.will interlock as clearly shown in Figure 1 of the drawings, preventingvertical movement of the tabs with respect to each other.

The end sections 8 are also out along the lines 2!, providing cornerpieces 22 which extend inwardly and rest on the bottom section orcentral section 5, when the ends are folded inwardly, thereby bracingthe central section at the corners of the box,

From the foregoing it will be seen that by cutting a length of cardboardbox material into a blank as shown by Figure 5 of the drawings andfolding the blank along the dotted lines, a box will be provided whichhas double walled ends and the tabs by means of which the end sectionsare connected to the sides, are so arranged that they will lock with theend and side sections to hold the box in its folded or boxlikecondition.

What is claimed is:

In a folding box, a blank comprising a central section, side sectionsformed along the side edges of the central section, said side sectionshaving slits formed intermediate their ends disposed at oblique angleswith respect to the edges of the side sections, end sections formed atthe ends of the central section, curved tabs formed at the ends of theend sections, said end sections overlapping the ends of the sidesections and extending to positions appreciable distances along the sidesections, the tabs thereof entering the slits of the side sections, saidend sections having spaced vertical slits, the ends of the side sectionsbeing folded inwardly towards each other over the end sections, tonguesformed at the ends of the side sections extending through the slits ofthe end sections, the tongues of the side sections being split inwardlyfrom their ends interlocking within the box when the split ends arebrought together, securing the end sections and side sections in theirextended positions and providing a, double-walled box.

HERBERT S. BLANDFORD.

REFERENCES CITED UNITED STATES PATENTS Number Name Date Meech Mar. 21,1893 Burns May 1, 1900 Myers May 12, 1914 Parker Apr, 1'7, 1923 KondolfMay 18, 1926 Meisner Feb. 19, 1929 Brown Nov.' 12, 1935 Towell Sept. 15,1936 Turner Feb. 14, 1939

